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Brushy Cyn. Deposits

Producer in Mariposa county in California, United States with commodity Mica
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Links to other databases
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10031050
MRDS ID M009620
Record type Site
Current site name Brushy Cyn. Deposits
Related records 10260618

Geographic coordinates

Geographic coordinates: -120.0682, 37.34799 (WGS84)
Relative position 2 MI. N AND SLIGHTLY W OF WHITE ROCK SCHOOL.

Site location context

Political divisions (FIPS codes)

Mariposa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Illinois Hill(quadrangle 1:24,000 scale)

Merced(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Fresno River(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Mariposa

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 007S 017E 01,02 California

Commodities

Commodity Importance
Mica Primary

Nearby scientific data

(1) -120.0682, 37.34799
ListMap

Economic information

Economic information about the deposit and operations

Development status Producer
Commodity type Non-metallic
Significant No

Mining district

District name White Rock.

Comments on the production information

  • THERE WAS A SMALL, INTERMITTENT PRODUCTION OF THE SCHIST IN THE 1930'S AND 1940'S, PRINCIPALLY FOR USE AS A LUBRICANT IN THE MANUFACTURE OF AUTOMOBILE TIRES. SO FAR AS IS KNOWN, NO PRODUCTION SINCE 1946.

Comments on the workings information

  • MAIN QUARRY ON MAIN SCHIST ZONE 15-20 FT. WIDE, 85-FT. LONG AND 20-30 FT. DEEP. - OTHER SMALL QUARRIES AND PITS.

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOLOGY, V. 53, NOS. 1 & 2, JAN.-APRIL, 1957, PP. 212-213, 338

General comments

Subject category Comment text
Deposit CU MINES VERY CLOSE TO SECS. 1 & 2. THE PITS AND QUARRIES EXPOSE A CONSIDERABLE TONNAGE OF UNIFORM ROCK IN WHICH QUARTZ IS THE ONLY MAJOR MINERAL OTHER THAN MUSCOVITE. SEVERAL MILLION TONS OF MATERIAL COULD BE DEVELOPED. SEE PRESS RELEASE - USBM 8/31/65 - ON RI6668 - NEW PROCESS TO PRODUCE MICA.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 Gere, W. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative California resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.